On Fri, 7 May 2010 23:07:46 +0200 Marcin Bukat <[email protected]> wrote:
> I am trying to find out why playback on MPIO HD200 needs much more cpu > than on other coldfire based DAPs. > 1) test_codec gives comparable results to other CFs. > 2) display drivers are pretty fast scoring ~764fps fullscreen updates > in test_fps. > 3) test_mem gives on MPIO: unboosted write 95kB/s, ubusted read 55 > kB/s, boosted write 267kB/s and boosted read 154kB/s. Pixelma posted > some results on IRC from iaudio M5 "bufsize: 514048, write ticks: 15 > (267 kB/s), read ticks: 26 (154 kB/s) - no change when boosted or > unboosted". So here is big difference when unboosted. > 4) disk transfers are comparable to CompactFlash modded ipod mini (I > am testing with CompactFlash also) > 5) playing wav MPIO runs unboosted after initial rebuffer. You've tested a lot of things already so hopefully you're not far now. > So basicaly I would like to ask for ideas where may be the problem. I > would like to ask also for test_mem results from other CF devices. For > me it looks a bit strange that Pixelma doesn't see difference when > boosted/unboosted. Did you try to run a profiled build ? Is there a fast counter which could measure the time taken by each tick? -- Rafaël Carré
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